Analytical

Atomic Absorption Spectrophotometer (AA8000)

The AA8000 Atomic Absorption Spectrophotometer is a true double beam with sealed and vibration free optical system, having Czerny-turner Monochromator with Holographic grating (1800 lines/mm). It’s a high performance automated instrument designed to meet the requirements of the modern laboratory. Due to its versatility and performance it can be used for a wide range of applications including:

Agriculture, Soil, Environmental, Food, Metal, Mining, Petrochemical, Clinical, Pharmaceutical.

THE INSTRUMENT IS AVAILABLE IN THREE CONFIGURATIONS:

1. Equipped with Flame Atomiser with options for three flame configuration:

     • Air/Acetylene as standard configuration

     • N2O/Acetylene or Air/LPG (Natural Gas) as option.

     • All three flame configurations are offered with coded burner for full safety and protection.

2. Equipped with Integrated Flame and Graphite Atomiser with easy change-over by simple selection in the AA-Win Software.

3. Equipped with Graphite Furnace Atomiser. The Graphite head is fixed into the optical path to maximise performance and eliminate drift. The transversely heated graphite tube is efficiently heated and cooled due to precision feedback system.

 

SALIENT FEATURES

 

• Benchtop Model.

• PC system built into the instrument as standard. Windows professional platform with latest version operating system.

• Full software control of the instrument and autosampler.

• Pre-installed AA-Win Software GLP and 21- CFR Part 11 Compliant, export of data to other applications and integrated QC Protocol.

• Automatic 8 lamp turret controlled and optimized by the AA-Win software.

• Automatic alignment and optimization of energy using coded lamps & built-in power supply.

• GLP compliant software is now available for all AA8000 Configurations.

• D2 lamp or Self reversal background systems.

• High precision minimal optics ensures maximum light throughput to the computer controlled Czerny-Turner monochromator.

• High sensitivity absorbance better than 0.9abs for 5ppm Cu

• A universal autosampler is available which can be used for flame as well as graphite furnace system with Auto Dilution facility.

• Absorption and Emission modes are standard as well as peak height, peak area, sequential and manual integration modes.

• Autoflame Ignition. Nebulizer Interlock for gas leakage etc.

• New upgrade available with Full Automation for Multi-Element Analysis.

• Spray chambers chemically inert material capable of handling all corrosive materials.

 

 

SOFTWARE FEATURES:

 

• Built in AA Cookbook for all elements

• Easy built in user Tools

• Automatic programming multiples of 8 elements approx 32

• Instrument controlled via built in PC

• Hallow Cathode Lamp Energy Graph

• Normal, Standard addition and standard curve calibration methods supported

• Flexible and comprehensive results database filters to select and display the required data.

• Validation Package

     a. Validation should able to be performed by the operator     

     b. Automatic OQ test available

• Height of Burner Head - stored in method

• Gas Flow Control: Fully Automatic, Software operated mass flow control for Fuel Flow. Total gas flow control system to maintain gas flow (Ratio of fuel/Oxidant) at set levels even when subjected to outside variations like nebulizer adjustments. Automatic gas flow adjustment during change over between Air/C2H2 and N2O.

 

FLAME ATOMISER FEATURES:

3 flame systems are available. Air/acetylene is the standard configuration with the N O/acetylene and Air/LPG as options.

 

Air/Acetylene

• This flame uses a 100mm single slot burner for standard configuration.

• The high sensitivity (Cu 5ppm > 0.9A) is due to the efficiency of the fixed position High Efficiency Nebuliser fitted as standard. An acid resistant replacement is available as an option.

 

N O/Acetylene

• The burner for this gas has a 50mm slot and is used to measure elements less prone to ionization such as: Aluminium, Tin, Titanium, Calcium and Vanadium.

  - The switchover from air/acetylene and flame off is fully computer controlled.    

 

Air/Propane (LPG)

• This flame uses a 3 slot burner and with the low pressure requirement it is also much safer to operate. Due to the lower temperature it is ideal for analysing alkali metals such as Potassium, Sodium and Lithium, especially when used in the Emission mode.

• There are some remote areas in the world that have difficulty obtaining acetylene or even a high enough purity to operate the flame, so LPG can give a real alternative and offer comparable results throughout the wavelength range.

Safety Features

• Gas Pressure Monitoring for all gasses • Burner Identification • Flame Sensor • Drain Trap level Sensor • Gas Leak Detector

• Safety cut off switch

 

GRAPHITE FURNACE ATOMISER FEATURES

The graphite furnace atomiser is available in 2 Models:

- In the AA8000G instrument the graphite furnace head is fixed into the light path.

- In the AA8000FG instrument the graphite furnace head is positioned automatically into the light path by a simple operation in the AA-Win software.

Furnace Head Design

- The Transverse head is heated and cooled efficiently due to the feedback system and has been designed to reduce analytical problems normally associated with this type of technique.

- Pyrolytically coated graphite tubes are used as standard and are manufactured to improve performance as well as increase the analytical life.

- Platform Tubes are supplied as standard and will accept volumes up to 20μl.

Heating Program

- Up to 10 heat stages are available. These can be set up and stored in the AA-Win software.

The graphite furnace tube is cooled efficiently by an optional water circulation system / chiller.

Safety Features:

     • Argon Gas Pressure Sensor • Water Flow Sensor

     • Over Temperature Sensor

    • Camera for Graphite furnace can be provided on request

 

Fully Adjustable Inert nebuliser

It is fully adjustable so that a wide variety of sample matrices - aqueous or organics (oils etc.), acid or alkali dilute or concentrated solutions can be analysed under optimum conditions.

  • Fully inert nebuliser
  • Adjustable from 2-6 ml/min
  • Excellent RSD's typically <1.0%
  • Enhanced sensitivity
  • Resistant to all acid including HF

 

HYDRIDE SYSTEM

Continuous Flow Hydride Analysis System

Main Features

• Improved detection limits for inorganic Hg

• RSD ≤ 2%

• Easily adapted to standard hydride mode with improved detection limits for As, Se, Sb and other hydride forming elements via a heated cell

• Improved stability: The micro peristaltic pump is controlled via AAHyd-Win creating a stable flow of sample and reagent and producing a stable formation of H2 gas and hydrides

• Compact system the smallest footprint of its kind on the market

(95mm x 118mm x 140mm)

• Chemically resistant: ceramic pins, PFA mixing block, and quartz glass

 

 

Flow Injection Hydride Generator

Main Features

1. Unique pneumatic automated technology such as auto-sampling system, automatic fluid measurement system, flow stabilizer (instead of the peristaltic pump), program-time controller and so on are pneumatic automatic systems which are run by the carrier gas source pressure. Many performances are superior to those of the electric systems.

2. Highly Automatic: After pressing the start key, the whole process (sampling, reacting, calibrating and cleaning) will be finished automatically. Automatically reading is possible when connecting with the main unit (if the main unit has the function)

3. Unique electric quartz absorption tube (atomizer): compact (can be used in the Zeeman AAS), speedy temperature rising, easy installation, and stable temperature. The lifetime of this tube is 10 times longer than the flame tube. As long as the temperature lowers down, the analysis method can be changed.

4. Superior performance (sensitivity, detection limit, stability, efficiency): the sensitivity of most elements is better than 1ng/ml/1%A. For example, the sensitivity of Arsenic is better than 0.15ng/ml/1%A. Relative standard deviation (RSD) is lower than 3%. The single measurement will take 25 to 35 seconds.

5. High adaptive: the hydride generator can be used on all the old models of AAS

6. Good reliability: low failure rate, seldom consumables.

7. Small footprint: width*depth*height = 20.5(cm)*15(cm)*12.5(cm); weight = 1.5 kg.

8. Multiple readings: peak height reading (recommended), peak area reading, continuous reading are possible

9. Less solution: sample 2-2.5 mL (including clean). potassium borohydride 1-1.5 mL, carrier liquid 5-6 mL

10. High performance lamps for hydride elements (e.g. Pb, As, Hg, Sb & Bi)

 

Specifications:

FLAME SYSTEM

 

Instrument can be configured with Flame, Graphite or Integrated Flame & Graphite (interchanged using Software)

Wavelength Range                             185nm – 915nm

Optics                                                  True Double Beam, Sealed & Vibration free optical System with a reflective optical compartment

Detector                                              PMT (Wide Range)

Monochromator                                  Czerny-turner type with Holographic Grating of 1800 lines/mm and Reciprocal Linear Dispersion                                                                  better than 1.6 nm/mm, focal length 300mm.

Spectral Bandwidth                            Adjustable slit from 0.1 nm. to 2 nm. (software selectable)

Wavelength Accuracy                         ± 0.15nm

Wavelength Reproducibility                < 0.05nm

Resolution                                           0.2nm ± 0.02nm

Baseline Stability                                0.005A/30min

Sensitivity (Cu)                                   >0.9 Absorbance or better for 5 ppm Cu solution

Detection Limit                                    Cu < 0.004 μg/ml (flame) Cd < 0.4 x 10-12g (graphite furnace)

Repeatability                                       Cu < 0.7% ( Air/Acetylene flame)

                                                            Ba < 1.0% ( Nitrous oxide/Acetylene flame)

                                                              Cu < 2.0% Cd < 2.0% (Graphite Furnace)

Background Correction                       Deuterium Arc / Self reversal upto 2.5 Absorbance

Characteristic Concentration              Cu < 0.02 μg/ml, Ba < 0.15 mg/ml (N O/Acetylene) Burner Heads 2

Nebuliser                                             High Efficiency fully adjustable Inert nebuliser

Burner Head                                       Titanium Alloy

Atomization Chamber                         Corrosion-resistant material

Position Adjustment                            Automatic Changeover for Integrated Flame and Graphite system. Automatic setting of optimum height of Flame Burner, Software controlled Burner movement both vertical and horizontal, Flame manual for horizontal only.

Safety Functions (Interlocks)              Burner Identification, Flame Sensor, Gas leak Sensor, Low Gas Pressure Sensor, Drain Trap Sensor, Power Loss Protection, Circulation Water (graphite), Over Temperature Sensor (graphite).

 

 

GRAPHITE SYSTEM

Graphite Tubes are pyrolytically coated & transversely heated upto 3000˚C Platform tubes supplied as standard, capable of accepting volumes upto 20 μL Programmable graphite furnace upto 10 stages which can be set & stored using Software Replacement of Graphite tube performed by a simple command using Software Graphite tube cooling by additional water circulatory system

Cd Sensitivity: 4x10-12 gm

Safety Features 1. Argon Gas pressure sensor

2. Water Flow sensor

3. Over Temperature sensor

4. Broken Graphite Tube protection

 

 

AUTOSAMPLER

The AA8000 Autosampler with Autodilution facility can be used with both Flame & Graphite Instrument Configurations with Dilution facility

Flame System

Vial Capacity                                       38 positions

Sample Vial Size                                6 ml

Standard Sample Vial Size                12 ml

Reproducibility                                    Cu < 0.6% (air/acetylene) Cu< 1.0% (air/LPG) Ba <1.0% (nitrous oxide/acetylene)

Pressure Protection for Wash

Position Adjustment using Software

 

Graphite System

Vial Capacity                                       76 positions

Sample Vial Size                                1.5 ml

Modifier Vial Size                                12 ml

Upto 3 Modifier                                   Additions

Reproducibility                                    Cu < 2.0 %, Cd < 2.0 %

Pressure Protection for Wash

Position Adjustment using Software

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